Single trigger mechanism for double barrel guns



Feb. 21, 1933. E, E. MILLER ET AL 1,898,255

SINGLE TRIGGER MECHANISM FOR DOUBLE BARREL GUNS Filed July 50, 1931 2 Sheets -Sheet 1 Feb; 21, 1933. i E. E. MILLER ET AL 1,898,255

SINGLE TRIGGER MECHANISM FOR DOUBLE BARREL GUNS Filed July 30, 1931 2 Sheets-Sheet 2 Patented Feb. 21, 1933 UNETE STATES FATENT FFEQE ELMEB E. MILLER AND HOWARD L MILLERQ, F MILLERSBURG, PENNSYLVANIA,

SINGLE TRIGGER MECHANISM FOR DOUBLE BAR-REL GUNS Application filed July- 30, 1931. Serial No. 554,130.

" shot guns of other makes and the general object of-the present invention is to provide a single trigger mechanism particularly adapted to this newgun and of such a compact form that it will fit within and be fully ac,-

" commodated relative to the small space in the new gun in which such mechanism can be accommodated.

A further object is to provide improved means for operating the selective sear tripping means and improved safety means for preventing any releaseof'the trigger when themeans is at safety. 7 Y A further object is to provide a trigger post which coaets with the safety slide to prevent actuation ofthe trigger and improved means including an inertia actuated weight which will prevent doubles or the firing of both barrels nearly-simultaneouslydue to'the recoil of the gun or to the reflex action of the finger.

Other objects will appear in the course of the following description;v i

Our i vention is illustrated in the accompanying drawings, whereinzv Figure 1 is a side elevation of the breech frame of a double barrel gun showing our improvement applied thereto, the parts being in the position takenwhen the gunis cocked;

Figure 2 is a like view to Figure 1 but showing the parts in the position taken when one barrel has been fired and the trigger held back or retracted;

F'gure 3 is a section on the line 3-3 of Figure 1; i p

Figure a is a section on the line 44: of Figure 1;

Figure 5 Figure l;

Figure 6 is a perspective view of the inertia actuated Weight;

is a section'on the line 5 5 of Figure 7 is a perspective View of the selector plate which is connected with the safety slide;

Figure 8 1s a perspective View looking toward the underside of the notched plate with which the selector plate shown in Figure coacts.

Referring to these drawings, 10 designates the breech casing of a double barrel fire arm of the shot gun typeand containing the usual 0 hammers 11. The firing pins are not shown.- The snap lever 12'provides means whereby the gun may be broken in the usual manner. 13 designates the upper tang and 14 the lower tang. The hammers are each notched at 15 and coacting with these. hammers are the sears or latches 16 and 17 one for eachhammer, these being approximately triangular in form to engagein the notches 15 and being pivoted at 18 to the upper tang.

These sears extend rearward as at 19.

The hammers are urged forward by means of the coiled compression springs 20 which are-engaged at their rear ends against a rear frame post 21 which extends from the lower tang to the. upper tang. The trigger 22 is pivoted at 23 and the rear end of the trigger is formed with an upwardly extending lug 24. Pivoted at 25Yupon this lug is the angular lower end or base of a trigger post 26, the upper end of which is reduced at 27 and extends through between the rearwardly projecting portions 19 of the scars 16 andl7. Pivotally mounted upon this trigger post just below this point of intersection with the portions 19 of the sears is a scar trip 28' having an upwardly extending middle portion 29 which is round upon its upper surfaceas illustrated in Figure 5 and-which is disposed beneath one or the other of the scars. This trip is provided with the outstanding arms 30 at its lower end and is pivoted to the trigger post at '31. The trigger post extends rearward at-this point as at'32." This pore tion 82 passes through a trigger guide opening 33 formed in an angulartrigger guide134 carried upon a bracket 35. Riveted or otherwise attached-t0 the rear framenpost 21% at 86 below the part 32 of the post 26 there is pivoted the inertia actuated weight 37 having its upper face downwardly and rearwardly curved at 38 and notched as at 39. The for-ward lower corner of this weight is formed with an ear 40 which is disposed within a vertical slot formed in the lower end of the at 41.

Surrounding the pivot pin 23 is a coil spring 42 which extends longitudinally along a groove formed in the lower edge face of'the base portion of post 26 and which bears against the forward corner of the ear 40 at 43. At this point, this ear is notched to receive this spring. V V This spring tends to urge the post upward and to keep the weight 37 bearing against the rear face of the post in the posit-ion shown in Figures 1 and 2. The notch 39 in this weight is normally disposed immediately beneath the downwardly extending flange 44 of the guide 34 so as to permit the trigger to be moved upward under pull. The upper tang is slotted or recessed at 45 just forward of the post 21. The safety slide 46 carries a post 46a extending downward through the post 26 and pivoted to the post 7 slot 45, this post carrying a transversely extending pin 47 and a spring 48 bears at its lower end against this pin and at its upper end against a relatively narrow plate 49 which is disposed within a recess on the in ner face of the upper tang 13. This plate at one end'is formed with an aperture 50 and forward of this aperture with a cross bar 51 (see Figure 7) which defines the forward end of the aperture. This plate at its opposite end is formed with a tooth 52 which coacts with a toothed plate 53'disposed in said recess, this plate being slotted at 54. This plate 53 is provided with transverse teeth 55 with which the tooth 52 is adapted to engage to hold thesafety slide 45 in any one of three positions.

lVhen the safety slide is fully pulled back, it permits the discharge of one barrel of the gun, as for instance, the upper barrel, where the gun has barrels disposed one above the other. WVhen the slide is fully pushed forward, then the under or lower barrel will be fired upon an actuation ofthe trigger and when the slide is in its middle position, it

is at safety.

In the middle position of the slide, the cross bar 51 will be immediately above and impede the upward movement of the trigger post when the trigger is pulled. When, how.- ever, the slide is pulled rearward to its full extent, the end of the plate 49 will have passed the upper end of the trigger post 27 and this will moveupward into the slot 45 permitting the pull of the trigger.

When the safety is shifted fully forward, then the opening 50 will be immediately above the upper end of the trigger post 27 and will permit the trigger to be pulled.

- The trip 28 is. actuated by the safety slide to select the sear which is to be released and to this end, it is pivoted at 34 as before explained so that its upper end 28 will rock into position beneath one sear or beneath the other sear. This trip does not have any in termediate position, but is either under one sear or the other. The trip is shifted toward the safety 45 is moved rearward to its full extent, the pin'46 moving against the inclined portion 57 flexes the spring toward the left, thus shifting'the selector trip toward the left and beneath the left hand sear. In the safety position, the trip moves into the bight 58 of the spring and the spring then forces the sear trip over to the extreme right into position to fire the right hand sear, but at this time the cross bar 21 of the blade 49 is immediately above the upper end of the trigger post and, therefore, the trigger cannot be pulled.

The weight 37,immediately the trigger is pulled for the first time, swings backward under inertia so that its curved face comes beneath the flange 44 and slight release of the pull on the to the natural reaction of the hand, the spring 42 causes this weight to swing forward, again bringing its notch39 beneath the flange 44 and permitting the second pull of the trigger.

It will be noted that the guide plate 34 performs avery important function inour gun. The guide plate acts to guide the upper end of the trigger post so that it will be disposed properlywith relation to the sears and it also acts to shift the sear selecting trip 28 from beneath the sear which has been fired to a position beneath the other sear upon a descent of the trigger post after the trigger has been pulled. Thus, assuming that the trip has been set, as shown in Figure 3, to fire the left hand barrel, then the trip will be below the sear 16 and will be urged to this position by the trip spring 58. Upon a pull on the trigger, the hammer post is raised with the trip and this lifts the left hand'sear. Upon a release of the left hand hammer,

trigger due when the trigger is fully pushed back, the

trip willremain beneath the left hand sear, the spring of the left hand sear causing this left hand sear to press down upon the trip; As the pressure on the trigger is gradually released, the left hand sear moves downward,

prevents a second involuntary pull on the trigger, but upon a bearing at thistime against the upper end of the trip and the hammer post moves downward until a point is reached where the left hand arm as in Figure 3 strikes the upper face of the guide plate 84. When this occurs, the trip is tilted toward the right in Figure 3 until the rounded end of the trip is forced past the inner face of the left hand searand then the sear spring forcing clownward on the sear causes the sear to wedge the trip over toward the right against the action of the trip spring 58, the sear preventing any return of the trip until the right hand barrel has been fired and the parts brought back to their normal position with the trip between the two sears. 7 Of course, it will be understood that the trip spring 58 is always urging the trip either toward the right or to the left, depending upon the position of the slide carrying the pin 46 which controls the trip spring 58.

Itwill be seen that we have provided a very 7 simple and effective single trigger mechanism for double barrel guns having barrels dis osed one above the other and in which the sears are located above toe hammers and that we have provided means for preventing (in guns of this character) double firing, that is, involuntary firing of the second barrel, immediately after the first barrel has been discharged and that we have provided simple and efiective means whereby the sear selecting trip may be shifted in one direction or the other to bring it beneath one or the other of the sears or whereby to prevent absolutely the retraction of the trigger and the tripping of the sears.

Attention is called to the fact that the upper end of the sear selecting trip is rounded, This rounded end is an important feature inasmuch as a surface is prevented beneath each sear which is at all times and without regard to wear approximately parallel to the face of the searv Furthermore. this rounded surface tends to prevent wear, whereas were the upper surface of the trip notrounded, it would wear slantingly and thus not present a proper engaging surface to the sear as it should do.

We claim v 1. A gun having two hammers, a single trigger, two sears, one for each hammer and located above the hammers, a trigger post pivoted to the trigger and extending upward between the sears, a safety slide, a sliding plate associated therewith and disposed above the upper end of the trigger post, the plate in one position impeding the retraction of the trigger and the upward movement of the post to a sear releasing position and in two other positions permitting the retraction of the trigger and the upward movement of the post to release a scar, a sear selecting trip carried on the post for movement into position, beneatheither sear, andmeans eonsear selecting trip into a position beneath one sear when the slide is in one of its posi-. tions and shifting. the trip into position beneath the other sear when the, slide, is in either of its other positions comprising a spring engaged with the trip and urging it beneath one of said sears, and a member carried by the slide and engageable with the spring when the slide is shifted into one of its positions forcing said spring laterally in the opposite direction through its tension to thereby carry the sear selecting trip beneath the other sear.

2. In a gun having an upper tang and a lower tang, two sears pivotally supported upon the upper tang, a trigger pivotally supported upon the lower tang, a trigger post extending upwardvfrom the trigger between said sears,- a sear selective trip pivotally mounted upon the trigger post for swinging movement into position beneath eithersear, aosafety slide mounted upon the upper tang and carrying amember adapted in one position of the slide to extend over the upper end of the trigger post and prevent upward movement thereof to a sear releasing position, a longitudinally extending spring disposed beneath theupper tang and constantly urging the trip into position beneath one of said sears, and means dependingfrom and carried by the slide and engageable with the spring upon a longitudinal movement of the slide to shift the spring in the opposite direction to that in which it is urged by its tension to thereby carry the trip into position beneath the other sear.

3. In a gun, two hammers, a single trigger, two sears, one for each hammer and located above the hammers, a trigger post pivoted to the trigger and extending upward between the sears, a guide for the trigger post having a depending flange disposed at the rear of and parallel to the trigger post, a weight pivoted at its forward lower corner to the trigger post for rearward swinging movement, the weight having a slot, a light spring normally urging the weight upward into a position against the trigger post and. with its slot in register with said flange, a sear selecting trip mounted on the trigger post above the guide and beneath said sears, a safety slide, and means carried by the safety slide in one position preventing upward movement of the trigger post to a sear releasing position, in another position shifting the trip to a position beneath one of the sears, and in another position permitting the trip to shift into a position beneath the other sear.

4. In a gun, two hammers, a-single trigger, two sears, one for each hammer and located above the hammers, a. trigger post pivoted to the trigger and extending upward between the sears, a guide for the trigger post having a depending flangedisposed at the rear trolled by the safety slide for shiftingthe,

of and parallel to the trigger post, a weight pivoted at its forward lower corner to the trigger post for rearward swinging movement, the weight having a slot, a light spring normally urging the weight upward into a position against the trigger post and with its slot in register with said flange, a sear selecting trip mounted on the trigger post above the guide and beneath said sears, a longitudinally extending spring engaging the trip and constantly urgingthe trip to a position beneath one of said sears, a safety slide in one position permitting the spring to shift the trip into position beneath one of said sears and in another extreme position engage said spring and urge it in a direction against its tension to carry the trip into position beneath the other of said sears, and in an intermediate position preventing upward movement of the trigger post to a sear releasing position.

5. In a gun, two hammers, a single trigger, two sears, one for each hammer and located above the hammers, a trigger post-pivoted to the trigger and extending upward between the sears, the trigger post, manually controlled means whereby the trigge post may be prevented from upward movement to a sear releasing position or the trip shifted into position beneath either one of said sears, and inertia actuated means carried upon the trigger post preventing involuntary'pull upon the trigger immediately after one hammer has been released.

6. Ina gun, a hammer, a trigger, a sear coacting with the hammer, a trigger post pivoted to the trigger and extending upward to one side of the sear, a sear engaging member mounted upon the trigger post, manually controlled means shiftable into position above the trigger post 'or out of such position whereby the trigger post may be prevented from upward movement to a sear releasing position or permitted to have such movement, an inertia actuated weight pivotally mounted upon the rear of the trigger post, and'yieldingly held against the trigger post, the weight having a vertical slot, and a member disposed above the upper face of the weight and normally disposed in alinement with the slot, the weight swinging rearward upon the discharge of the gun to carry its slot out of 'alinement with the member and prevent the further pull upon the trigger, but returning to its normal position upon the release of the pressure on the trigger.

7. A gun having twohammers, a single trigger,- two sears one for each hammer located above the hammers, a trigger post the lower end of the trigger post extending angularly toward the butt of the gun, the rear extremity of the angular extension being pivoted to the rear end of the trigger, the trigger post eX- tending upward between the scars, and means a scar selecting trip mounted upon,

through which the upper end of the trigger 7 post passes, and means for causing the selec-' tive engagement of the trigger post with either one of said sears.

9. In a gun, two hammers, a single trigger, two sears, one for the hammers, a trigger post having an angular lower end, the rear extremity of which is pivoted to the rear end of the trigger, the trigger post extending upward between the sears, a guide for the trigger post having a depending flange disposed at the rear of and approximately parallel to the trigger post, a weight pivoted at its forward lower corner to the trigger post for rearward swinging movement' and having a slot on its upper face, a

light spring normally urging the weight upposition against the trigger post ward into a and with its slot in register with said flange, and means for selectively engaging the trigger'post with either one of said sears.

each hammer located above- 10. A gun having two hammers, a single trigger, two sears, one for each hammer and located above the hammers, a trigger post pivoted to the rear end of the trigger, the trigger post extending upward between the sears, a sear selecting trip mounted upon the trigger post, and manually operated means for shifting the trip to engage either sear upon the lifting of the trigger post.

11. A gun having two hammers, a single trigger, and two sears one for each hammer, the sears being located above the hammers, a trigger post pivoted to the rear end of the trigger and extending upward between the sears, a guide through which the upper end of the trigger post passes, a sear selecting trip mounted upon the upper end of the trigger post for movement into position beneath either sear, and'manually operable means for shifting the trip to select either sear for firing.

12. A gun having two hammers, a single trigger, two sears, one for each hammer and located above the hammers, a triggerv post pivoted to the rear end of the trigger, the trigger post extending upwardbetween the sears, a sear selecting trip pivotally mounted upon the trigger post and having lateral extensions on each side of its pivot, and a guide mounted upon the frame of the gun, and through which the trigger post extends, the guide having a flat upper face against which one/or the other extension of the trip engages In testimony whereof We hereunto affix our signatures.

ELMER E. MILLER. HOWARD L. MILLER. 

